Washington, DC: Federal marijuana trafficking prosecutions have declined significantly since the passage of statewide laws regulating the plant’s production and retail sale to adults, according to data provided by the United States Sentencing Commission.

According to their latest factsheet, the number of marijuana trafficking offenders prosecuted at the federal level fell dramatically after 2012 – declining from over 6,000 annually to fewer than 4,000 in 2015.

“The number of marijuana traffickers rose slightly over time until a sharp decline in fiscal year 2013 and the number continues to decrease,” it concludes.

The period of decline overlaps with the passage and enactment of adult marijuana sales in various US states, including Colorado, Oregon, and Washington.

Those convicted of marijuana trafficking spend an average of 29 months in prison, the report found.